Non-Contact Elevator Button Triggering via 3D Camera Tip Coordinate Detection
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Solution Overview
Problem
Elevator buttons in high-traffic areas pose a risk for the spread of viruses and bacteria due to direct contact, with existing non-contact methods being prone to misjudgment, noise interference, or humidity issues, and requiring frequent disinfection or user-operated systems.
Innovation Solution
A non-contact elevator button triggering method utilizing a 3D camera that senses time-series images, determines the target object's tip coordinate, and transmits control signals to activate buttons without direct user contact, maintaining original operating habits and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If voice control is used to trigger elevator buttons, then non-contact operation is achieved, but the operation may be disturbed by ambient noise
Solution Approach 1:
The patent replaces voice control (acoustic field) with 3D camera-based visual recognition (optical field). The system captures images of users' hands and fingers, tracks their movement and position in 3D space, and determines button activation based on visual detection of hand gestures and contact intent, thereby eliminating noise interference while maintaining non-contact operation
Solution Approach 2:
The patent introduces a 3D camera as an intermediary between the user and the button system. Instead of direct mechanical contact or acoustic voice commands, the 3D camera captures visual information about the user's hand position and gestures, which is then processed to trigger buttons, serving as a non-contact intermediary that is immune to environmental noise
2Ease of operation
If infrared rays are used to trigger elevator buttons, then non-contact operation is achieved, but the operation may be affected by ambient humidity
Solution Approach 1:
The patent replaces infrared ray-based triggering (electromagnetic field) with 3D visual recognition (optical field). The system uses a 3D camera to capture images and depth information of users' hands, tracks their movement through image processing, and determines button activation based on visual detection, thereby eliminating sensitivity to ambient humidity while maintaining non-contact operation
Solution Approach 2:
The patent introduces a 3D camera as an intermediary that is insensitive to environmental conditions like humidity. The camera captures visual information about hand position and gestures, which is then processed to trigger buttons, serving as a non-contact intermediary that maintains reliable operation regardless of ambient humidity levels
3Object-affected harmful factors
If disinfection film is attached to buttons, then virus spread is reduced, but the film requires functioning time and frequent disinfection
Solution Approach 1:
The patent extracts the button interaction from the physical contact domain entirely. By using 3D camera-based visual recognition to detect hand gestures and contact intent, the system enables button activation without any physical contact, thereby removing the need for disinfection films and eliminating the ongoing requirement for frequent disinfection while still preventing virus spread
4Object-affected harmful factors
If non-contact button triggering is implemented, then virus spread is prevented, but misjudgment rate increases
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously captures images through the 3D camera, processes them to detect hand position and gestures, and adjusts its detection in real-time based on the user's actions. The system tracks the movement of fingers and hands over time, using temporal information to confirm intended button activation and reduce misjudgment, thereby maintaining high detection accuracy while preventing virus spread
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents the spread of viruses by allowing non-contact button activation with reduced misjudgment rates, enhancing usage efficiency and convenience, and integrating seamlessly with existing elevator systems.
Implementation Method 1
sensing time series data with a sensor arranged on an operation panel, wherein the time series data includes at least one image
Data Source
AI summary
Disclosed are techniques for elevator control. In an aspect, a sensor senses time series data, wherein the time series data includes at least one image, and range of the image covers a plurality of buttons. A system module configured to determine whether the image contains a target object; determine a tip coordinate of a tip of the target object when the image contains the target object, wherein the tip refers to a point of the target object with the closest distance to the operation panel; and determine button information corresponding to the tip coordinate among a plurality of button information, and transmit a control signal at least according to the button information, wherein the plurality of button information is associated with the plurality of buttons. A controller receives the control signal and perform control operation according to the control signal.